Dannypwills

Thanks for your help all (sounds like I'm being a bit rash!) - I'll run down the list you suggest Pete and see how that goes. The filters on it are standard and in the airbox/nothing unusual, and i do have the remperature compensators. Both carbs were fully reconditioned by Enguinity in Acton so I'm hoping will just be a case of messing around with the bits mentioned above to get back to running well.

Hi all I have a MKIII GT6 which I have had constant issues with from a running perspective. When I bought it, it constantly ran rich/fouled the plugs and had a set of SU HS4s on it. I had a decent Triumph specialist take a look and they replaced the needles with more suitable ones, and the car ran OK for a while, but constantly reverted back to running rich. We then changed the carbs back to the original CD150s which came with the car, reconditioned before they went back on, and again the car drove well for a while, but then slipped back into the usual issues. The starter motor, plugs, leads and distributor have all been changed, as have the fuel lines, manifold and filters. It's got to the point where I hardly drive it as, whilst I can get it running well, leaving it overnight results in the same problems the next day (the car is very difficult to start, even on a warm day, constantly hesistates under acceleration and generally runs quite poorly). I am thinking about buying the EFI system from Classic Fuel Injection, and wondered if anyone has had any positive/negative experiences? I would rather leave it as it is, as much prefer the idea of an original set up with the carbs, but (having been told the engine is sound) I am at a loss for what to do next in order to get the car driveable, other than trying to remove the fueling issue altogether. On a related note, someone has also crashed into the driver side wing, resulting in quite a nasty gouge in the bodywork. If anyone has any reccomendations for a bodyshop in North London/Bucks/Herts, that would be greatly appreciated! Thanks all Danny

Thanks all, and I may have to take you up on this Pete, as I am only down the road in North London. The HS4s were on the car when I got it, with the PO having taken off a set of CD150s. I asked Dale whether I should get those refurbed and refitted, but he thought keeping the HS4s was the better thing to do. I am also not sure where the manifold has come from so would rather avoid having to start messing about with anything more than i need to! I will try and and adjust to run a more rich mixture and see where we go from there, and have also ordered a compression tester to see if there is an issue there. I'm running a relatively new set of Bosch WR78s after fouling up too many sets of NGKs, and they seem to running better, and so hopefully it is just a case of having gone too lean with the fuel mix. And then perhaps if that doesn't work I need to think about getting the carbs overhauled!

Hi all I have a MK3 GT6 with HS4s which I recently posted about, and could do with a bit of advice. When I posted, the car was constantly running rich and fouling the plugs, and so took it to see Dale at Moordale Motors who balanced and tuned the carbs, replaced the needles and reset the timing which, initially, saw it running very well. However, within a few weeks the car was back to running too rich/fouling plugs, and so I leaned it out a bit until it was running nicely. However: (i) I am now experiencing a loss of power/misfire under load, particularly in 3/4th gear and not very noticeable in 1st/2nd or when pulling away; and (ii) having to start the car with the choke fully open, even when the engine is up to temp. All that suggests (in my basic knowledge) that I may be too lean, but grateful for any thoughts/whether this could be anything else (i.e. a timing issue etc.). I've had a look with a Colourtune, and if anything I am on the very border with running too rich, so that has confused me too! Just to add, the HS4s I originally had on had an opening for the vacuum advance, but the right hand carb body cracked when I was trying to get the jet out to refurb them, so i had to replace with an eBay job which doesn't have anywhere to plug the advance into. Mike @ Moordale suggested that wasn't an issue and he preferred not to attach the advance in any event, but adding here in case relevant. Hoping I can resolve as it spoiled what was otherwise a great drive from North London to West Sussex down the A3 at the weekend! Thanks in advance. Danny

Thanks all - appreciate the help! Have booked in at Moordale Motors so they can have a good look at it and potentially put the CD 150s back on. In the meantime the dizzy has bust so looking everywhere for an Accuspark that i can install!

Hi all I wanted to introduce myself as I am the proud owner of a 1973 MKIII GT6 in midnight blue. I bought the car from a great bloke in Rotterdam who had bought from a Dutch guy who exported in 2003, and who had looked after her excellently ever since (and given her a huge overhaul). I'm struggling at the moment to try and get the right balance/mix through the SU HS6s which the previous owner installed, and seem to be running rich no matter what I do! I'm in North London and would like to take the car to someone who knows what they are doing to take a look at that issue and to give it a once over, and so any recommendations would be hugely appreciated! Looking forward to contributing on here! Thanks Danny